louis



B. DICK.

RELAY.

APPLICATION FILED JULY 5. i916.

1,812,522, Patented Aug. 12,1919.

Fig. W A

Lg IAIVENTOE l6 1 ll UNITED STATES PATENT OFFICE.

BURNS DICK, OF ST. LOUIS, MISSOURI, ASSIGNOR- TO VIAGNER ELECTRIC ENG GQMPANY, OF ST. LOUIS,

MANUFACTUR- IYIISSOURL A CORPOEATIGN O33 MISSGURI.

RELAY.

Specification of Letters Fatent.

To all whom it may concern l Be it known that 1, Bonus Dion, a subject of the King of England, residing at the city of St. Louis, State of Missouri United vStates of America, have invented a certain new and useful Belay, of which the followto which an automo lie is subjected. My invention will be better understood by reference to the accompanying drawings, in which Figure l is a longitudinal section through the relay and the indicating device; Fig. 2 is an end view of the relay from the terminal side; Fig. 3 an end view from the indicating side; Fig. elis a rear View of the i 5 a diagram of connections.

The relay is contained in a cup-shaped rece tacle made of ma netie material n'ovided with a metal but non-magnetic cap 30,

through which protrude the two termlnals 25' and 26. The cup 2 is fastened to a base 18 provided with a cover 19, shaped to form,

' with the base, a chamber for thereception of the indicating apparatus and adapted to be fastened to some convenient part of the automobile, for instance the cowl thereof.

In the center of the cup 2 is placed a cylindricalpore 3, held in firm and magnetic contact w th the cup by means of the nut 17.

Sun-omitting this core and located within the cup Zljare two'concentrically arranged dynamo electric machine 28 may be pro 105 coils. 7 and 6. The coil J has fewer turr vnled with two mam brushes and a fl Patented Aug. 1.2, 1919.

Application filed July 5, 1916. Serial No. 107,546

than the coil 6 and is formed of larger wire.

the plunger 10. The plunger ll is proton ably made o1" nonanag'nctic material. its flange l2 cooperates with a projection 15 formed on the cross-piece 3% ol the bracket 33 pivoted on the pin 14. which pin is held in a support 20 attached to the base 18 of the relay. (hie side member of the support 20 is longer than the other and is bent back upon itself, as shown in Fig. lat 37, so to form a stop coiiperatin; with the onespiece 36 of the bracket tor the purpose of limiting the travel of said bracket in one direction. The support 20 and the bracket 33 are preferably made of non-magnetic material. The bracket carries a bent plate 38, on which is inscribed the word Off at 31, and the word Charge at 13. The arrangement is'such that one of the words comes opposite thcnvindow 32 provided in the cover 19, for one position of the plunger. while the other word appears at this window for the other position of said plunger.

As more clearly .hown in Fig...

ing is such a full, clear, and exact descripsupports the contact terminal 16. tion as will enable anyone skilled in the The metal bracket '24-, clamped between art to which it appertains to make and use part or ch f th t u d 26, i .the same, reference being had to the acelectrical connection with the terminal 25- companying drawings, forming part of this but insulated from the terminal 26, supports, specification. at the point 9. a Hat spring 35 provided with I, My invention relates to relays such as are a contact 8 adapted to cooperate with the used in connection with a storage battery stationary contact 16 and normally held and. a dynamo electric machine adapted to away from the latter. A plunger 10 of noncharge the same. .lt is particularly applimagnetic material fitting into an opening in cable for use'in connection with the battery themagnctic core 2-! lined with a sleeve 22 of 7c and generator employed on automobiles. nonmagnetic material, carries the armature Some of the objects of my invention are, to. -'l of magnetic material and is loosely coupled produce a compact, cheap and mechanically by means of a rod and adjusting out with well-protected relay, and to combine therethe spring supporting the movable contact 8. with an indicating device adapted to show The plunger is insulated from the sprin 35 whether the battery is Connected to or discarrying the contact 8 by means of the busln connected from the charging generator. A. mg 27. The plunger 10 cooperates with a further object is to produce a relay with plunger 1.1, provided with a flange l2 and light moving parts not likely to be displaced located in the axis of the core 3 within a from any operating osition by road shocks hole smaller than that which zuieonimodatcs so iary brush, the exciting winding 34 being connected between one main and the auxiliary brush. One of the main brushes is grounded, the other is connected to the terminal 26, which makes electrical connection with one end of each of the coils 6 and 7. The other end of the fine wire coil 6 is connected to the cup 2, which cup is grounded. The other end of the coil 7 is connected to the stationary contact 16 cooperating with the movable contact 8, which latter is in electrical connection with the terminal 25 to which is connected one pole of the battery 29, while its other pole is grounded.

The magnetic circuit of the relay comprises the core 3, the cup'2, and the mov-- able armature l attached to the plunger 10. This movable armature has openings which permit the two terminals 25, 26, and the stationary contact 16 to project into the space inclosed by the cover 30, without interfering with the movement of the armature 4. The fine wire coil 6 is always in circuit with the main brushes of the dynamo 28, but the battery 29 is connected to said brushes only when the circuit is closed at the contacts 8 and 16, in which case the battery is connected to the dynamo through the winding 7.

This indicating relay should be mounted in a position in which its axis is not vertical in case gravity, rather than a spring, is relied upon to restore the indicator to its off position, and the projection 15 on the bracket 33 should lie below the center line of the relay. v

The operation of this indicating relay, for

any of the positions for which it is best suited, is as follows: As long as the dynamo is at rest, or is running at such slow speed as to generate an E. M. F. smaller than the normal terminal voltage of the battery 29, the magnetization produced within the cup 2 by the linc wirc coil (3 will not be sailicient to overcome the spring 35 and attract the armature 4 into close proximity with the edges of the cup The contacts 8 and 16 will, therefore, be kept at a distance from each other, and the battery circuit, indicated in Fig. 4. will be open. As long as the plunger 10 is under the control of the spring 35, the plunger 11, which may or may not be fastened to the plungcr10, will not exert any pressure on the projection 15 of the bracket 33, and the latter, impelled by gravity in this instance, will so place itself as to display, through the window 32 the word Off written on the plate 31 But as soon as the voltage of the dynamo has reached a value approximating that of the storage battery :29. the armaturel will be attractcd and the battery circuit closed at the points Fa and 16. As long as the dynamo voltage is the same as that of the battery, no current will flow either way, but as soon as the dynamo voltage rises, a charging current will be sent c into the battery, which charging current Wlll circulate through the coil 7, energizing the magnetic circuit of the relay in the same direction as that in which it is energized Charge will come opposite the window 32,

thus advising the driver of the automobile that the battery is being charged. Should the speed of the dynamo fall to a value for which the voltage at the main brushes of the latter is less than the voltage at the te minals of the Storage battery, then the latter will send a current into the dynamo 28, with the result that the current through the iooil 7 will be reversed, opposing the magnetization of the coil 6 and causing an immediate release of the armature 4. The spring 35, now being in control, interrupts the battery circuit at the points 8 and 16, thus preventing the useless discharge of the battery 29. At the same time the pressure of the plunger 11 on the projection 15 isrelaxed and the bracket 33 falls into its posi tion of rest, advising the driver of the change which has taken place, by displaying the word Ofi'.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States, is:

1. A relay comprising a cup,a core of magnetic material positioned in said cup, an

.exciting coil within said cup and surrounding said core, a block of insulating material held in position in one end of said cup, connecting terminals and a stationary contact terminal all supported on said block, and a movable contact member supported from a the stationary contact terminal.

connecting tcriiiinal-and cooperating with 2. An indicating relay comprising 3 0y lindrical cup of magnetic material, a core of magnetic material positioned in the cup, a coilsurroundingthc core within the 'cup, and a circular disk of magnetic material movably supported cup, said disk being of approximately the same diameter the cup, and provided with openings, and stationary connecting terminals for the relay extending through the openings in the disk.

3. In combination, a solenoid, an armature, a supporting base for said solenoid, a cover provided with a sight-opening and forming with said base an incloscd chamber,

whereby the armature may actuate the indicator.

'ljacent to the end oftho an indicator in said chamber, and means 4. In combination, a solenoid, an armature, a supportlng base for said solenoid, a

cover provided with a sightopening and of a solenoid and armature therefor, an indicating device operated by the armature and provided with an ndicating plate carrying different indications spaced apart thereon, a supporting base for the relay, and a= cover for the indicating device attached to the base and provided with a sight-opening adjacent to the indicating plate.

6. In a relay, means forming a magnetic circuit, said means comprising a cylindrical outer member of magnetic material, a core of magnetic material centrally positioned within said outer member and in magnetic connection therewith at one end, an armature cooperating with said outer member and core, an exciting coil Within the outer member and surrounding the central core, a block of insulating material for holding the coil in place, conducting terminals support ed on said block, and a movable switch arm supported on said terminals.

7. In a relay, means forming a magnetic circuit, said means comprising a cylindrical outer member of magnetic material a core of magnetic material centrally positioned Within said outer member and in magnetic connection therewith at one end, an armature cooperating with said outermeinber and core, an exciting coil within the outer member and surrounding the central core, a block of insulating material for holding the coil in place, conducting terminals supported on said block, a movable switch arm supported on said terminals, an indicating device, and means extending through the core and operativelyconnecting the armature and indicating device.

In a relay, means forming a magnetic circuit, said means comprising an outer member of magnetic material, a core of magnetic material centrally positioned within said outer member and in magnetic connection therewith at one end, an armature cooperating with said outer member and core, an exciting coil within the outer member and surrounding the core, a block of insulating material for holding the coil in place, two conducting terminals and a contact terminal supported on said block, and a movable switch arm supported on the conducting terminals and cooperating with the contact terminal, said switch aim being in mechanical connection with the armature.

9. A relay comprising a cup, a core of magnetic material positioned in said cup and provided with a central opening, an exciting; coil within said cup and surrounding said core, a block of insulating material held in position in one end of said cup, connecting terminals and a stationary contact terminal all supported on said block, a plunger slidingly mounted in the core and carrying an armature cooperating with said core, and a movable contact member cooperating with the stationary contact terminal and loosely coupled to said plunger.

In testimony whereof, I have hereunto set my hand and a'l'lixed my seal in the presence of the two subscribing witnesses.

BURNS DICK. [L.s.]

W i tuesses CHAS. II. WEIMEYER, HARRY Hnnze. 

